sampling distribution of sample mean

例句：

1. 1. In thisstudy, we used a sampling distribution to estimate the population mean.
   在这项研究中，我们使用抽样分布来估计总体均值。
2. 2.The sampling distribution of the sample mean is used to calculate the confidence interval.
   样本均值的抽样分布用于计算置信区间。
3. 3.The sampling distribution of the sample mean is important for understanding the variability of the data.
   样本均值的抽样分布对于理解数据的变异性至关重要。